Electromagnetic separator



April 22 1924.

B. E. FERNOW, JR

ELECTROMAGNETIC SEPARATOR Filed July 2. 1921 IN VEN TOR. Ben/M EBM/ML ATTORNEY I site projecting into said pole pieces; ingat substantially right angles to Patented Apr. 22, 1924.,

UNITED STATES PATENT OFFICE.

3. narrow, 13., Oil IILWAUKEE, WISCONSIN, ASSIGNOB TO THE CUTLER- m no. 00., O1 mwaoxm, WISCONSIN, A CORPORATION OF WISCONSIN.

ILEC'I'BOIAGNETIC SEPALL'IOB.

Application fled July 2,

:waukee and State of Wisconsin,- have invented new and useful Improvements in Electroma "following is a full, clear,concise, and exact etic Separators, of which the description, reference being had to the accompanying drawing, forming a part of this cification.

This invention relates to electro-magnetic separators and more particularly to separators for extracting free magnetic particles from flowing substances.

The invention has among its objects to rovide. an electro-magnetlc separator of mcreased'efiectiveness and efliciencyand of simple, durable and inexpensive construction.

Another object is to provide an electromagnetic separator having its. parts arranged to rovide for cooling of the separator winding by the substance undergoing a treatment.

Another object is to providea separator of the aforesaid character having certain of its parts readily removable to facilitate cleaning thereof.

Various other objects and advantages of the invention will hereinafter appear.

. The accom anying drawing illustrates certain embodiments of the invention which will now be described, it being understood that various changes can be made in the embodiments illustrated without departing fromthe scope of the appended claims.

In the drawing,

Fig. 1 is a vertical sectional view of a ferred form of separator embodying the .urvention Figs. 2 and 3 are fragmentary sectional views illustratin certain modifications whichcan be ma in the separator shown in Fig. 1; and

Fig. 4 is a plan view of one of the parts illustrated in ig. 8.

The se arator comprises in general a ct winding 1 coiled about a non-magnetlc tubular sleeve 2, and provided with a etic enclosing casing 3, pole pieces 4 m arranged within said sleeve at opposite ends thereof and a cylindrical magnetic core 6 within said sleeve and having oppo- 1921. Serial I0. 8.,009.

The diameter of core 6 is les than the inner diameter of tube 2 to form a passage 7 for the material, said passage being restricted at 0pOS1t6 ends of said core by pole pieces 4 an 5. The material undergoing treatment enters at the lower end of passage 7 and emerges at the upper end thereof and as hereinafter set forth, the flux produced by wlnding 1 is concentrated in the restricted portions of said passage and extends at substantially right angles to the direction of the flowing material. I

More specifically, enclosing casing 3 includes a member 8 having a cylindrical opening therein for receiving winding 1 and a cover 9 secured to the upper edge thereof by screws 10. Casing member 8 is rovided with openings for receiving termina s 11 for winding 1, one of said terminals bein shown in the drawing, and cover 9 is tappe to receive clamping screws 12 for engaging the upper face of winding 1 to hold the latter in place. Cover 9 and the lower wall of casing member 8 are provided withbored openings for receiving sleeve 2, said sleeve having a press fit within said openin Pole pieces 4 and have a press fit within sleeve 2 and project outwardly therefrom. Said pole pieces have their inner faces screw threaded at 13 and the opposite ends of core 6 are provided with screw threaded ortions 15 which project into said surfaces.

ore 6 is supported within sleeve 2 between non-magnetic centering plug 16 and 17 which fit within pole ieces 4 and 5 respectively and are provi ed with openings 18 adjacent their outer ed 5 which cmmunicats with passage 7. fit within pole piece 4 and is provided with a recess for receiving a cylindrical pro'ec tion 19 on the lower face of core 6 w '10 plug 17 is removable from pole piece 5 and as a cylindrical projection 20 fitting within a recess in the upper end of and core. Plu 17 is provided with a tapped opening 21 w ich communicates with a tapped opening 22 in the upper end of core 6, said openings serving a purpose hereinafter set forth.

With the parts of the separator-arranged as above described it is apparent that substantially the entire flux of winding 1 passes across the air gaps, between, pole pieces 4 and 5 and the sfposite ends of core 6, the direction of the u! in said bee ow-' lug 16 has a drive ing material. The screw threaded surfaces on opposite ends of core 6 and with n pole pieces 4 and 5 coact accentuate the flux at a. plurality of points in said air gaps and therefore upon p of the material through said air gaps e magnetic particles therein are subjected to relatively strong magnetic ulls towards said surfaces. Further it s ould be noted that with the parts arranged as above described the magnetic circuit of win 1 is of relatively small reluctance an also that the material in passing through sleeve 2 has a cooling effect on said winding. In operation the material is passed through the separator until the screw threaded surfaces on opposite sides of the air gaps become loaded with magnetic material and the separator may be then readil cleaned by de-energizing winding 1 and flushing the same by passin water thlrlogfh the upper end thereof. A so, if des' core 6 can be readily removed from the se rator for cleaning by means of a screw lt inserted into the ta ped openings 21 and 22.

n installing the separator the sleeves 4 and 5 are provided with pipe fittings 23 and 24 respectively, said fittings having openings 23' and 24" respectively for receiving the inlet and discharge pipes for material and 0 enin 23" and 24 for receiving the supp y an drain pipes for the wash water.

Referring to Fig. 2 the same illustrates a modification of certain of the parts illustrated in Fig. 1. Instead of providin screw threading in the adjacent surfaces 0 core 6 and pole pieces 4 and 5, said surfaces are scored, the scoring in pole piece 4 consisting of a plurality of spaced grooves 25 and scoring at the lower end of core 6 consisting of a plurality of spaced grooves 26. The grooves 26 in core 6 are arranged in staggered relation with respect to the grooves 25 in pole piece 4 whereby the. material undergoing treatment travels in a tortuous path through the air ga between said parts. It is apparent that po e piece 5 and the upper en ofoore 6 can be provided with similar grooves or scorin Figs. 3 and 4 illustrate a modi cation wherein a plurality of air gaps are provided between pole piece 4 and core 6. As shown in this figure, said air ga are provided by reducing the diameter 0 the lower end of core 6 and arranging an annular m etic pole piece 27 between the same an pole piece 4. Core 6 and .annular pole piece 30 are supported b a non-magnetic centering plug 28, said p ug being provided with a ser es of recesses 29 in the periphery thereof which communicate with the passages on opposite sides of pole piece 30. The upper face of said plug is also provided with a central recess for receiving the projecting end 19 on the lower end of core 6 and a series of recesses 30 for receiv the lower end of annular gale piece 27. t is apparent that the num r of air gag between pole piece 4 and core 6 can increased by increasin the number of annular pole pieces 27 and a that the arts at the up er end of the separator can a be modifie as shown in Fig. 3.

What I claim as new and desire to secure by Letters Patent is:

1. In an electromagnetic separator, in combination, a winding having an axial passage therein for the material unde ing treatment and means associated with said windin for concentrating its flux at opposite ends thereof and for directing the flux at substantially right angles to the direction of the material undergoing treatment.

2. In an electro-inagnetic separator, in combination, a winding having an axial opening therein, a core within said opening and traversed by substantially the entire flux of said windin the cross sectional area of said core beingd ess than the Iaerea of said 0 niii to rovieapassage tweente siiiiie ai id said winding for the material undergoing treatment.

3. In an electro-magnetic separator, in combination, a winding having a central opening therein, a cylindrical core member extending through said opening and traversed by substantially the entire flux of said winding, the cross sectional area of said core member being less than the area of said opening to provide an annular passage between the same and said coil for the mate rial undergoing treatment. a

4. In an electro-magnetic separator, in combination, a winding having a circular opening extending axially therethrough, a cylindrical core member extending thro said winding and arranged centrally with respect thereto, the cross sectional area of said core member bei less than the area of said opening to provide a passage for the material undergoin treatment and means associated with sai winding for providing concentrated flux zones at opposite ends 0 said core.

5. In an electro-magnetic separator, in combination, a winding having a circular opening therein, a non-magnetic sleeve within said opening, a core member within said sleeve arran d centrall with respect thereto, the diami ter of sai core member being less than the inner diameter of said sleeve to provide an annular passage for the material under ing' treatment and annular pole pieces within said sleeve and arranged adjacent opposite ends of said core.

6. In an electro-magnetic separator, in combination, a winding having a opening therein, a magnetic enclosing casing therefor, a non-magnetic tubular sleeve extending through said winding and supported at opposite ends by said casing and a core member within said sleeve arranged centrally with respect thereto, the diameter of said core member being less than the inner diameter of said sleeve to rovide an annular passage for the materia undergoing treatment.

7. In an electro-magnetic separator in combination, a winding having a central opening therein, a magnetic enclosing casing for said winding, a non-magnetic tubular sleeve extending through said winding and supported at opposite ends by said casing, magnetic pole pieces arranged at op 0- site ends of said sleeve and a core member within said sleeve and havin its opposite ends projecting into said po e pieces, said core member being of smaller diameter than the inner diameter of said sleeve to provide a passage for the material undergoing treatment.

8. In an electro-magnetic separator, in combination, a winding having a central opening therein, a magnetic enclosing casing for said winding, a non-magnetic tubular sleeve extending through said winding and supported at opposite ends by said casing, annular magnetic pole pieces fitting within opposite ends of said sleeve and a core member within said sleeve and having its opposite ends projecting into said pole pieces, the adjacent surfaces of said core member and said le pieces being scored to provide for furt er concentration of the flux between said surfaces.

9. In an electro-magnetic separator, in combination, a winding having a central passage therein, a magnetic enclosing casmg for said winding, 0. non-magnetic tubular sleeve extending through said winding and supported at opposite ends by said casing, annular magnetic (pole pieces within said sleeve and arrange on opposite ends thereof, a core arranged within said sleeve and having its opposite ends projecting into said pole pieces and sugportmg means for said core carried by sai sleeve.

10. In an electro-magnetic separator, in combination, a winding having a circular opening therein, a magnetic enclosing casing for said winding, a sleeve extending through said windin and supported at o posite ends by sai casing, annular poe pieces fittin" within opposite ends of said sleeve, a cy indrical core arranged within said sleeve and having opposite ends projectin into said pole pieces, said core bemg 0 such diameter as to rovide a passage between the same and said pole pieces and also between the same and said sleeve and supporting members for opposite ends of em core fitting within said pole pieces, one of said supporting members bein fixed to its respective pole piece and the 0 or being removable therefrom.

11. In an electro-magnetic sepdrator, in 

